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WO1996026021A1 - Procede et unite de traitement permettant d'eliminer des substrats biologiquement contamines - Google Patents

Procede et unite de traitement permettant d'eliminer des substrats biologiquement contamines Download PDF

Info

Publication number
WO1996026021A1
WO1996026021A1 PCT/DE1996/000262 DE9600262W WO9626021A1 WO 1996026021 A1 WO1996026021 A1 WO 1996026021A1 DE 9600262 W DE9600262 W DE 9600262W WO 9626021 A1 WO9626021 A1 WO 9626021A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
containers
cleaning
rinsing water
equipment
Prior art date
Application number
PCT/DE1996/000262
Other languages
German (de)
English (en)
Inventor
Bernhard Kammermeier
Original Assignee
Bernhard Kammermeier
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bernhard Kammermeier filed Critical Bernhard Kammermeier
Publication of WO1996026021A1 publication Critical patent/WO1996026021A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/0075—Disposal of medical waste
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L11/00—Methods specially adapted for refuse
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/04—Heat

Definitions

  • the invention relates to a method and the essential features of a treatment plant, which are used to clean batch vessels, which contain liquids with health-endangering potential and to dispose of the contents harmlessly for humans and the environment, the dangerousness of the contents being caused by biological cell substances, which are do not have inactivated by sterilization.
  • DNA -Sequences are fragments of protein chains that represent the genetic information In genetic engineering research, they are decoded and specifically modified to produce certain desired properties of cells
  • the invention has for its object to define an economical process and the crucial features of the associated system, the microorganisms and DNA sequences that are not inactivable by common sterilization methods, makes them biologically ineffective, and ensures that such a way by a closed system contaminated substances do not have to be discharged into the domestic wastewater or the atmosphere, and the auxiliary equipment is safely decontaminated.
  • the aim of the treatment is the irreversible inactivation of the pathogenic microorganisms contained in the waste (column 4, lines 19-20).
  • the waste is treated by means of a moist temperature of> 105 ° C. over a period of 10 minutes (column 5, lines 33-35) for comparison purposes
  • This system is also designed for the processing of waste, which consists primarily of solids and only to a small extent from liquids. for comparison, subject of registration
  • the invention has for its object to define an economical process and the crucial features of the associated system, the microorganisms and DNA sequences that are not inactivable by common sterilization methods, makes them biologically ineffective, and ensures that such a way by a closed system contaminated substances do not have to be discharged into the domestic wastewater or the atmosphere, and the auxiliary equipment is safely decontaminated.
  • the containers are emptied (1) in such a way that the substrate only comes into contact with parts of the system that can themselves be decontaminated (description of the emptying device, see below).
  • the containers and auxiliary equipment are then arranged on washing racks (Fig. 2; 101) , which either only serve as a holder, or also have pipe registers that allow the containers to be sprayed out intensively.
  • the pipe registers of the washing racks are supplied with rinsing liquid via an automatic coupling device inside the washing chamber.
  • the containers are then fed to a washing chamber (Fig. 2; 102) and first rinsed (2).
  • cleaning liquid water is pumped from the pre-rinse water tank (3) into the washing chamber and distributed over the pipe register.
  • cleaning aids such as detergents can be added.
  • the contaminated waste water from this treatment step is preferably not returned to the pre-rinse water tank (3), but rather to the substrate collection tank (20) or to a treatment step in which a substrate solution of a similar degree of contamination is processed, e.g. cleaning and concentrating the thin phase (22) after the first concentration step.
  • the containers and equipment are successively cleaned with rinsing water of a higher degree of purity.
  • Main rinsing (4) with water from the main rinsing water tank (5) and then rinsing (6) with water from the rinsing water tank (7) follows.
  • the drain water from the washing chamber is preferably fed to the rinsing water tank with the next higher degree of contamination.
  • the various rinse water tanks are additionally connected to pipes so that water can be transferred from the cleaner tanks to the less clean ones without washing, if necessary, but not vice versa.
  • acidic cleaning additives are used for main rinsing (4) and alkaline ones for rinsing (6), it may be disadvantageous to feed the waste water from the rinsing process (6) to the main rinsing water tank (5), since the alkalinity of this water increases consumption acidic cleaning additive during main rinsing (4).
  • the temperature is regulated to the value that promises the best washing success by supplying heat to the relevant rinsing water tank or in the washing chamber.
  • main rinsing (4) and rinsing (6) this will preferably be in the range between 45 ° C and 95 ° C.
  • pre-wash (2) it may be necessary to cool the pre-wash water (3) by indirect heat exchange, since there is a risk of protein-containing substrate soiling that caking occurs on the containers and equipment. It is also possible to use cold fresh water for pre-rinsing.
  • the disadvantage is that an additional amount of water has to get into the system and be treated, for which there may not be a possibility of reuse after the treatment.
  • the different washing processes can take place in succession in one and the same washing chamber, or in separate chambers.
  • the washing rack In the second case, the washing rack must be transported from one chamber to the next by a suitable transport device.
  • the air must be heated to temperatures that safely inactivate the biologically active cell substances.
  • This is preferably done by supplying it to the combustion chamber in which the dry substrate is also burned (32).
  • Steam-air mixtures such as those formed when the rinsing water is heated, are preferably first freed of the steam component by indirect cooling and the condensation (12) associated therewith before the largely dry air component is fed to the combustion chamber.
  • the condensate is fed into one of the rinse water tanks or combined with the thin phase from the substrate preparation (22).
  • the heating can take place, for example, by circulating air and heating it by electric radiators or by heat exchange with the exhaust air from the
  • the heat treatment (9) is preferably carried out in a specially designed
  • Treatment chamber take place, but can optionally also take place in a washing chamber
  • the heat treatment (9) is followed by active cooling of the
  • Exhaust air from the heat treatment chamber is in turn preferably the combustion chamber
  • the heat treatment of the container (9) can also be omitted if the container and
  • the substrate in the substrate collection tank (20) is present in sufficient quantity, it is fed to a series of processing steps which serve to separate the dry mass of the substrate from the liquid phase.
  • the technical equipment and separation processes depend on the properties of the substrate to be processed. The following parameters of the substrate are particularly important:
  • the pure phase is fed to the pure water tank (23) or the collecting tank for the ultrapure water (25) if it is certainly completely free of biologically active cell substances
  • the water in the pure water tank (23) does not necessarily have to be completely free of biologically active cell substances, since it is only used to make up the other rinse water tanks and is used to rinse the containers and equipment (8), which are then heat treated anyway.
  • the entire flushing water volume remains in circulation; however, the amount of liquid from the prepared substrate also comes into the system.
  • This amount is from the clean water tank (23) if necessary via a further post-cleaning stage (24), e.g. is carried out in the form of a reverse osmosis or distillation, to the collecting tank for the ultrapure water (25). From this it can be removed for reuse for the substrate preparation or for another use. If there is no use, it can also be sent to the domestic wastewater. For safety's sake, however, it should be subjected to a final check for DNA sequences (26) beforehand.
  • the collecting tank for the ultra pure water (25) and the subsequent cleaning (24) can be omitted.
  • the concentrate which is formed in the first stages of substrate concentration (21) is fed to a drying stage (30).
  • a drying stage (30)
  • several methods can be used, the application of which again depends on the properties of the substrate. Drying in a rotating drum, which is heated from the outside and in an inclined position by internal screw conveying, feeds the dried substrate to the combustion chamber for drying the dry substrate (32).
  • a spray drying process is probably less suitable. If necessary, a drying aid can also be added during the drying process, which can also act as an additional fuel (e.g. sawdust).
  • the exhaust steam rising during the drying of the concentrate (30) is condensed (31) by indirect heat exchange and fed to one of the processing stages for the thin phase (22).
  • the non-condensable gases produced during the condensation of the exhaust steam (31) are introduced into the combustion chamber for dry substrate combustion (32).
  • Adequate oxygen supply and sufficient dwell time within the combustion chamber must ensure that the dry substrate is completely burned, and that the polluted air supplied from various preparation stages is sufficiently long is kept at a temperature by which the biologically active cell substances are completely inactivated.
  • the flue gas flow may have to be passed through reheater facilities.
  • This method may be necessary to use a firing process that contributes to improved mixing in the combustion chamber.
  • This can e.g. be a fluidized bed process.
  • This method also has the advantage that it is particularly suitable for burning substances with poor calorific value, as may be the case. is the case with the dry substrate, is well suited.
  • a disadvantage of this design is that water is lost from the system with the concentrate and additional fuel must be used in the combustion chamber for the evaporation and overheating of the water content. As a result of the additional volume of gas resulting from the evaporation of the water content, the combustion chamber and the flue gas discharge must be made significantly larger.
  • the device for discharging the ash (33) is preferably designed so that the ash is still reheated for a defined period of time in order to reliably inactivate any adhering biologically active cell substances.
  • This facility can e.g. in the form of an outside be carried out by the flue gas heated pipe with slow internal screw conveyance.
  • the folding door preferably also serves as a pouring device for emptying the containers and as a drip tray when the containers are placed with the opening facing down on the washing frame (101).
  • the substrate is fed directly to the washing chamber (102) via an inclined plane (104), which is incorporated in the folding door (103).
  • a substrate collection and drip tray must be installed over the entire area of the inlet ramp (105).
  • This is preferably designed in the form of individual trays (106) in such a way that the edges of the individual trays (106) overlap and, as a result, no substrate can pass between the trays.
  • the individual tubs (106) can be dismantled and selected in size so that they can be accommodated on a washing rack (101) and can thus be washed and decontaminated within the system. This process can be carried out by the operator of the system at regular intervals. It is considered advantageous to convey the washing racks (101) in a hanging manner via an overhead transport rail (107), since in this case the transport rail does not come into contact with the drip off substrate, as would be the case with an underlying transport rail.
  • the drip pan (108) can be attached to the washing rack so that it is inside the
  • Wash chamber can be pivoted by a suitable drive so that it is completely emptied in the tilted position (109).
  • the drip pan (108) can be provided at the deepest with an opening (110), the outside of the washing chamber by a spring-loaded valve plate (111) with a sealing ring
  • valve plate (1 12) is closed.
  • the valve plate is lifted from the tub floor against the spring force by a suitable movement element (113), thereby allowing the substrate and the rinsing water to flow away. Since any part of the system can leak, through which biologically active cell substances can escape, it is necessary to install suitable collecting devices below the system, but these must be carried out again so that they can be cleaned of substrate contaminants and decontaminated advantageous to build up a collecting device in the form of individual divisible tub elements (114), each of which is only large enough to be washed and decontaminated within the system.
  • the tub elements (114) are designed so that they are tightly sealed to one another so that if a tray element (114) overflows, the substrate is taken up by the adjacent tray elements without liquid penetrating downwards.
  • the collection volume of all tray elements (114) must be greater than the maximum liquid volume that can escape from the system
  • a tightly welded large-area floor pan (115) is used either exclusively or in addition to the tub elements (114) under the entire area of the system, as this is not washed in the system and can be decontaminated, it is preferably equipped with panel heaters (116) on the underside and the rare walls, by means of which it is possible to heat the tub after pumping out the leaked liquid to such an extent that residual adhering biologically active cell substances are safely inactivated
  • the drip pans are equipped with a suitable alarm device to report a leak, as well as with a pumping device that can be decontaminated within the system when disassembled

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

L'invention concerne un procédé permettant d'éliminer des substrats contaminés biologiquement et de nettoyer et de décontaminer les contenants et les équipements contaminés par ledit substrat, à l'intérieur d'une unité fermée. Les substrats, les contenants et les équipements sont traités dans cette unité fermée, de façon à éviter la pénétration de substances cellulaires biologiquement actives dans un système d'eaux usées ou dans l'atmosphère, avec le substrat lui-même, et/ou avec l'eau de rinçage servant à nettoyer les contenants et équipements. Après vidage du substrat dans un réservoir collecteur (20), les contenants et équipements subissent un nettoyage en plusieurs étapes (2, 4, 6, 8) avec des eaux de de rinçage (3, 5, 7, 23) et des additifs de nettoyage. Ensuite ils sont chauffés (9) à une température supérieure à 200 °C au moyen d'un procédé de chauffage à sec, ce qui permet de rendre inactives des substances cellulaires biologiquement actives adhérant éventuellement aux contenants et équipements. Les phases liquide et solide du substrat dans le réservoir collecteur et les liquides de nettoyage sont séparés, ce qui permet d'éliminer le substrat sec ou un substrat fortement concentré par incénération ultérieure dans une chambre de combustion (32). La 'phase mince' formée à partir de la concentration de substrat (21) et de l'eau débordant des réservoirs collecteurs (3, 5, 7), est nettoyée au moyen d'un procédé approprié, jusqu'à ce qu'elle puisse être réutilisée sous forme d'eau de rinçage. Le volume de la 'phase mince' (22) ne pouvant être utilisée sous forme d'eau de rinçage, est complètement débarrassée des substances cellulaires biologiquement actives, jusqu'à ce que, après un contrôle final attestant l'absence d'impuretés résiduelles (26), elle puisse être déversée sans risque dans les eaux usées ou être utilisée dans une nouvelle préparation de substrat (11). Les émanations d'air ou de mélanges air-vapeur provenant des chambres de traitement et des réservoirs collecteurs sont décontaminées au moyen d'un traitement thermique ultérieur.
PCT/DE1996/000262 1995-02-22 1996-02-20 Procede et unite de traitement permettant d'eliminer des substrats biologiquement contamines WO1996026021A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19506151.9 1995-02-22
DE19506151A DE19506151C1 (de) 1995-02-22 1995-02-22 Verfahren und Aufbereitungsanlage zur Entsorgung von biologisch belasteten Substraten

Publications (1)

Publication Number Publication Date
WO1996026021A1 true WO1996026021A1 (fr) 1996-08-29

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Application Number Title Priority Date Filing Date
PCT/DE1996/000262 WO1996026021A1 (fr) 1995-02-22 1996-02-20 Procede et unite de traitement permettant d'eliminer des substrats biologiquement contamines

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DE (1) DE19506151C1 (fr)
WO (1) WO1996026021A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047063A1 (fr) * 1998-03-13 1999-09-23 D.P.S. Procede et dispositif de recyclage et de decontamination de poches telles que des gants jetables pour salles blanches
CN112122315A (zh) * 2020-09-15 2020-12-25 湖南祥柏生态环保科技有限公司 生物安全防控式病死动物收集处理方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590863A (en) * 1969-04-28 1971-07-06 Sybron Corp Washer for hospital and laboratory glassware and the like
EP0179045A2 (fr) * 1984-10-04 1986-04-23 VOEST-ALPINE Aktiengesellschaft Installation pour l'élimination des déchets
DE3938546C1 (en) * 1989-11-21 1990-07-12 Christel 2000 Hamburg De Silber Feed worms in high temp. hospital waste disinfector - have separate high pressure steam and sub-atmos-zones
EP0439645A1 (fr) * 1990-01-30 1991-08-07 Officine Metalmeccaniche Nova S.P.A. Procédé pour l'alimentation commandée de déchets urbains et/ou spéciaux dans une installation d'incinération et installation pour la mise en oeuvre du procédé
DE4303034A1 (de) * 1993-02-03 1994-08-04 Anton C Lenz Mobile Desinfektionsanlage, insbesondere für Klinikabfälle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590863A (en) * 1969-04-28 1971-07-06 Sybron Corp Washer for hospital and laboratory glassware and the like
EP0179045A2 (fr) * 1984-10-04 1986-04-23 VOEST-ALPINE Aktiengesellschaft Installation pour l'élimination des déchets
DE3938546C1 (en) * 1989-11-21 1990-07-12 Christel 2000 Hamburg De Silber Feed worms in high temp. hospital waste disinfector - have separate high pressure steam and sub-atmos-zones
EP0439645A1 (fr) * 1990-01-30 1991-08-07 Officine Metalmeccaniche Nova S.P.A. Procédé pour l'alimentation commandée de déchets urbains et/ou spéciaux dans une installation d'incinération et installation pour la mise en oeuvre du procédé
DE4303034A1 (de) * 1993-02-03 1994-08-04 Anton C Lenz Mobile Desinfektionsanlage, insbesondere für Klinikabfälle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047063A1 (fr) * 1998-03-13 1999-09-23 D.P.S. Procede et dispositif de recyclage et de decontamination de poches telles que des gants jetables pour salles blanches
CN112122315A (zh) * 2020-09-15 2020-12-25 湖南祥柏生态环保科技有限公司 生物安全防控式病死动物收集处理方法

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